Go Back   Blazer Forum - Chevy Blazer Forums > Mechanical & Maintenance > General Tech Help > 2nd Gen S-series (1995-2005) Tech
Sign in using an external account
Register Forgot Password?
Search


Welcome to Blazer Forum!
Welcome to Blazer Forum,

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to start new topics, reply to conversations, privately message other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Blazer Forum today!


Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 11-18-2012, 08:34 PM
New Member
1999 Chevrolet Blazer
 
Join Date: Aug 2011
Location: southern maine
Posts: 66
daddyx2 is on a distinguished road
Send a message via AIM to daddyx2 Send a message via Yahoo to daddyx2
Default common exhaust leak places?

i'd just like to say before i start typing down the symptoms here, i did do a search for this page!!!!
Vehicle: 99 s10 blazer LT 4x4 4 door
Issue: exhaust leak at start up, loudest on passenger side around firewall from outside of vehicle with hood closed. as vehicle warms up the sound goes away completely well at idle anyways. the sound reappears around 2-2500 rpms, with the hood popped and my head on the right side of the engine i can't hear a thing at all. at idle doing a walk around the vehicle (with hood open and then again with hood closed) the worst spot is still the right side of the vehicle near the firewall.
Questions: are there common places for blazers to have exhaust leaks that could relate to this issue? and i'd rather find it myself before paying some $80-$100 an hour mechanic, just to poke around. THANK YOU FOR THE HELP IN ADVANCE!!!
__________________
99 s10 blazer lt - 177,500 miles
K&N oem replacement filter, ac delete pulley, sylvania hyper white hi beams and low beams, and brake lights, fancy tail lights, hankook 724s in 235/75/15, pioneer head unit, and electric starter.

Cant wait to get a set of cragar soft 8s soon...
Reply With Quote
  #2  
Old 11-18-2012, 09:56 PM
richphotos's Avatar
Moderator
1993 GMC S-15
 
Join Date: Dec 2011
Location: Minneapolis, MN
Posts: 3,860
richphotos is a jewel in the roughrichphotos is a jewel in the roughrichphotos is a jewel in the rough
richphotos1
Send a message via AIM to richphotos Send a message via MSN to richphotos Send a message via Yahoo to richphotos
Default

At the exhaust manifold where it meets the Y pipe is a pretty common place for them to leak, You could possibly hear it from the location you are describing.
One way to find out, is listen under the car right behind the front tires when you hear that noise.
__________________
1993 GMC Jimmy S15 SLT
4.3L Vortec
Digital Dash, keyless entry, leather and power everything
Reply With Quote
  #3  
Old 11-18-2012, 10:04 PM
richphotos's Avatar
Moderator
1993 GMC S-15
 
Join Date: Dec 2011
Location: Minneapolis, MN
Posts: 3,860
richphotos is a jewel in the roughrichphotos is a jewel in the roughrichphotos is a jewel in the rough
richphotos1
Send a message via AIM to richphotos Send a message via MSN to richphotos Send a message via Yahoo to richphotos
Default

At the exhaust manifold where it meets the Y pipe is a pretty common place for them to leak, You could possibly hear it from the location you are describing.
One way to find out, is listen under the car right behind the front tires when you hear that noise.
__________________
1993 GMC Jimmy S15 SLT
4.3L Vortec
Digital Dash, keyless entry, leather and power everything
Reply With Quote
  #4  
Old 11-18-2012, 10:13 PM
New Member
1999 Chevrolet Blazer
 
Join Date: Aug 2011
Location: southern maine
Posts: 66
daddyx2 is on a distinguished road
Send a message via AIM to daddyx2 Send a message via Yahoo to daddyx2
Default

so would that be just exhaust manifold, or the y pipe that need to be replaced, and how many hours labor do you think this would require? and i strongly hope that the motor wouldnt have to be pulled to fix this...Im a college student for the next four years anyways..gotta make it last 4 more years before i can throw a new motor in it, and make it how i really want it to be!thank you again.
__________________
99 s10 blazer lt - 177,500 miles
K&N oem replacement filter, ac delete pulley, sylvania hyper white hi beams and low beams, and brake lights, fancy tail lights, hankook 724s in 235/75/15, pioneer head unit, and electric starter.

Cant wait to get a set of cragar soft 8s soon...
Reply With Quote
  #5  
Old 11-18-2012, 10:19 PM
richphotos's Avatar
Moderator
1993 GMC S-15
 
Join Date: Dec 2011
Location: Minneapolis, MN
Posts: 3,860
richphotos is a jewel in the roughrichphotos is a jewel in the roughrichphotos is a jewel in the rough
richphotos1
Send a message via AIM to richphotos Send a message via MSN to richphotos Send a message via Yahoo to richphotos
Default

Its usually the gasket between the 2. To fix that, the motor does not need to be removed, but a word of advice, SOAK the exhaust bolts in pb blaster or some other penetrating oil, to prevent them, or lower the chance of them breaking.
__________________
1993 GMC Jimmy S15 SLT
4.3L Vortec
Digital Dash, keyless entry, leather and power everything
Reply With Quote
  #6  
Old 11-18-2012, 10:56 PM
New Member
1999 Chevrolet Blazer
 
Join Date: Aug 2011
Location: southern maine
Posts: 66
daddyx2 is on a distinguished road
Send a message via AIM to daddyx2 Send a message via Yahoo to daddyx2
Default

it is a 99 with over 85% original parts..only things that have been replaced were normal wear an tear items, and the motor, 3 times. is the reason for having the leak only on one side of the vehicle just because of the way the pipe is run? or more than likely the weak spot in the gasket? thanks again for the help man.
__________________
99 s10 blazer lt - 177,500 miles
K&N oem replacement filter, ac delete pulley, sylvania hyper white hi beams and low beams, and brake lights, fancy tail lights, hankook 724s in 235/75/15, pioneer head unit, and electric starter.

Cant wait to get a set of cragar soft 8s soon...

Last edited by daddyx2; 11-19-2012 at 12:49 AM.
Reply With Quote
  #7  
Old 11-22-2012, 09:52 AM
abig84's Avatar
BF Veteran
 
Join Date: Aug 2009
Location: munster indiana
Posts: 2,906
abig84 will become famous soon enoughabig84 will become famous soon enough
Default

alot of times when the exhaust ticks then shuts up after it warms up a bit its the manifold to block gasket, thats very common. ive had lots of leaky Y pipe gaskets and they never shut up
Reply With Quote
  #8  
Old 11-22-2012, 03:07 PM
neo71665's Avatar
Super Member
 
Join Date: Dec 2007
Location: rison AR
Posts: 1,941
neo71665 will become famous soon enoughneo71665 will become famous soon enough
Send a message via Yahoo to neo71665
Default

I've never run exhaust manifold gaskets on a chevy engine and only one that leaked had a cracked manifold. Chevy 4, 6, and 6 with iron heads and manifolds just seal off if clean when put together. Now with aluminum heads or headers gaskets are required.

Most likely the donut gasket at the bottom of the manifold to y pipe. 4.3s are bad about motor mounts tearing in 2 and this stresses the donut making it leak.
__________________
1987 s-10 blazer 4x4, 3.4, 700r4, np207, 3.73 gears...dana 60s, built 5.7 sitting in the shop working on custom frame and linked suspenstion (soon to be a true S-TON blazer)
1991 gmc sonoma reg cab, bone stock....3.4 swap coming
Reply With Quote
  #9  
Old 11-22-2012, 05:09 PM
Senior Member
 
Join Date: Sep 2008
Location: Snow Hill MD
Posts: 733
step66 is an unknown quantity at this point
Default

In regards to neo7: You are so correct! But my experience with GM engines goes back to the Cadillac 390,which used exhaust gaskets and burned through them,just like the oil those engines used! My 66 small block uses gaskets and has had the same set in for 16 years. My 1984 "M" 350 did not have gaskets from the factory and developed a tick,gaskets did not solve the problem(bad manifold casting)had to go with headers,which I did not want on that truck! Later series of this same 350 (89/91) did not give me any issues,nor has any 4.3 equipped trucks.
Reply With Quote
Old 11-22-2012, 05:09 PM
 
 
 
Reply

Tags
94, 95, 99, blazer, block, chevy, donut, exhaust, gasket, leak, leaks, manifold, s10, seams, small


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Exhaust leak bassson 2nd Gen S-series (1995-2005) Tech 16 11-20-2012 08:59 PM
Common Vacuum Leak Sites??? ComputerNerdBD Engine & Transmission 2 02-21-2012 11:39 PM
Exhaust Leak willyman82 Engine & Transmission 3 01-12-2011 02:55 AM
question about common gas tank leak issue bezerker General Chat 5 11-16-2009 09:33 AM
exhaust leak steve645 1st Gen S-series (1983-1994) Tech 11 06-05-2009 09:48 AM

Advertising

Featured Sponsors
Vendor Directory
Our Sponsors

All times are GMT -5. The time now is 10:19 AM.

Internet Brands, Inc.



SEO by vBSEO ©2010, Crawlability, Inc.